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Finding the Fourth Proportional to 818.43, 1,129.49 and 459.56

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Solution

The fourth proportional to 818.43, 1,129.49 and 459.56 is: 634.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.43 : 1,129.49 = 459.56 : x
  2. Step 2: Convert to fraction form
    818.43/1,129.49 = 459.56/x
  3. Step 3: Cross multiply
    818.43x = 1,129.49 × 459.56
  4. Step 4: Simplify right side
    818.43x = 519,068.42
  5. Step 5: Solve for x
    x = 519,068.42/818.43
  6. Step 6: Final answer
    x = 634.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.